Perhaps you should try some spelling variations:
"synchronising swimming" » "synchronizing swimming", "synchronisations swimming"
"synchronize stemming" » "synchronizing stemming", "synchronize streaming", "synchronize steering", "synchronize flemming"
"synchronized stemming" » "synchronizingd stemming", "synchronized streaming", "synchronized steering", "synchronized flemming"
"synchronism stemming" » "synchronism streaming", "synchronism steering", "synchronism flemming"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("synchronising swimming") or ((((("synchronize stemming") or ("synchronism stemming"))) or ("synchronized stemming"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronising swimming") OR ((((("synchronize stemming") OR ("synchronism stemming"))) OR ("synchronized stemming")))).
• Removing quotes may allow a broader search: (( synchronising swimming ) or ((((( synchronize stemming ) or ( synchronism stemming ))) or ( synchronized stemming )))).
• Adding a wildcard symbol may retrieve word variants: (("synchronising swimming") or ((((("synchronize stemming") or ("synchronism stemming"))) or ("synchronized stemming"))))*.